Coal-washer.



H. CORY.

GOAL WASHER.

APPLICATION IILED MAR. 25, 1913, RENEWED EEB. e, 1914.

Patented May 5, 1914.

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HARVEY CORY, or DORMON'I BOROUGH, PENNSYLVANIA.

GOAL-WASHER.

Specification of Letters Patent.

Patented-May 5,1914.

Application file-:1 March 25, 1913, Serial No. 756,681. Renewed February6, 1914. Serial No. 817,052.

To all whom it may concern:

Be it known that I, HARVEY CORY, a citizen of the United States,residing at Dormont Borough, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inCoal-Washers, of which the following is a specification.

My invention relates to improvements in coal washing apparatus and isdesigned to provide, in such an apparatus or machine, a jig constructionembodying a reciprocable jig frame having a screen bottom, incombination with a relatively stationary valved head, constructed andadapted to operate in the manner more fully hereinafterset forth.

Referring to the drawingsFigure 1 is a longitudinal vertical sectionalview through the washer, taken on the line II of Fig. 2. Fig. 2 is aplan view of the washer. Fig. 3 is an enlarged detail view showing amodified construction of the valve.

Referring to the drawings, 2 represents the tank, vertically arrangedbetween the rectangular inclosing walls 3, in the upper portion of whichis reciprocably mounted a vertically operating jig 4. Said jig isgenerally rectangular in construction, pro vided with walls fittingsomewhat snugly within the walls 3 of the jig tank, whereby to make asubstantially working fit therein, but not necessarily water tight. Thejig is actuated by pitmen 5 and cams or eccentrics 6 and suitablegearing 7 from any available power, as will be readily understood, andas is customary in an apparatus of this type. Crushed coal is deliveredto the jig by a chute 8 from a bin or other suitable source, undercontrol of the operator, to the jig as needed. The jig is provided atsome distance above its lower end portion with a perforated bottom 9adapted to collect the heavier impurities, as slate, sulfur, etc., saidscreen bottom being preferably inclined, as shown, toward an impuritiesoutlet opening 10. Said opening is controlled by a sliding gate 11,actuated through suitable mechanism from an operating handle or lever12, preferably mounted on the stationary frame work of the structure.The lower wall 13 of the jig below outlet 10 is spaced back slightlyfrom the adjacent wall 3, providing ample clearance for passage of theimpurities downwardly into the lower portion of the jig tank 2, fromwhence they are removed by a screw conveyer 14, or other suitablemeans.Adjacent to the jig tank is the washed coal tank 15 of generallyrectangular shape, having surrounding walls 16, inwardly sloped at thebottom portion, from whence the washed coal is taken by an elevator 17or other suitable means. The par tition between the jig tank and thewashed coal bin is lowered, as indicated at 18, providing an overflowconduit. for the washed coal from the jig, such conduit being submergedbelow the water level a. At the other side of the washed coal tank is anoverflow conduit 1.8 from whence Water is returned from the upperportion of tank 15 backwardly through conduit 19 to the jig tank 2 belowthe jig, thereby providing for circulation of the water. Intheserespects, the apparatus is generally similar to that shown and describedin patent of Bradford, N 0. 143492, of Oct. 7,1873. The particularfeature of novelty in connection and combination with the jig structureof this type, is a stationary bottom 20, independent of the jig, locatedwithin the four downwardly extending walls4 and 13 of the jig, andrigidly mounted within the tank by suitable supporting timbers 21. Thestationary bottom 20 is provided with a plurality of water circulatingopenings 22 having opening and closing valves 23, adapted to open forupward flow of water. on upward travel of the jig, and to close againstdownward circulation on lowering the jig, whereby to cause the waterabove bottom 20 to pass upwardly through the screen 9 into the workingportion of the jig. The advantages of this construction are that theythus produce an enforced circulation of the water by checking its backflow within the lower portion of the jig, avoiding the necessity ofmounting circulation valves on the jig itself.

In order to render the valves 23 as sensitive as possible,'they may, ifdesired, be counterweighted, as indicated in Fig. 3, in which case thevalve 23 is pivoted at 24 on theupper edge portion of a suitable casingor frame 25, the valve having a rear extension 26 carrying acounterweight 27, preferably adjustable thereon. -A stop abutment 28may, if desired, be located beneath the counterweight so as to limit theupward travel of the valve. By this means the valve is rendered quitesensitive, and will open or close under slight variations of the flow ineither direction by the act-ion of the reciprocable jig.

As thus constructed, the washer as a whole is capable of continuousoperation, it provides for ample water circulation, and the valves maybe so constructed and adjusted as to provide for the desired flow andvolume of water, depending upon the quality of the material beingwashed, supply of water, or other conditions.

The construction may be changed or varied in different features ofdesign, proportions, or otherwise by the skilled mechanic, but all suchchanges are to be considered as within the scope of the followingclaims.

hat I claim is:

1. In a coal washing apparatus, the combination with the jig tank havingan apertured stationary valved bottom extending transversely of thetank, of a reciprocable jig embracing said bottom by its lower portionand having a transverse supporting screen, substantially as set forth.

2. In a coal washing apparatus, the com bination with the jig tankhaving an apertured stationary bottom extending transversely of the tankand provided with counterweighted valves, of a reciprocable jigembracing said bottom by its lower portion and having a transversesupporting screen, substantially as set forth.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

HARVEY CORY.

IVitnesses O. M. CLARKE, FREDK. STAUB.

tower of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

